AISI 4419 Steel, mock carburized

AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round Product Information -:- For detailed product information, please contact sales. -: AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round Synonyms -:- For detailed product information, please contact sales. -:

AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: AISI 4419 Steel, Mock Carburized & Tempered Condition** ## **Product Overview** **AISI 4419 Alloy Steel - Mock Carburized & Tempered Condition** This product is a **14 mm (0.55 in.) diameter round bar** made from AISI 4419 case-hardening alloy steel, which has undergone a specialized **mock carburizing treatment followed by tempering at 150°C (300°F)**. This treatment simulates the thermal cycle of a carburizing process (excluding carbon infusion) to achieve a uniform through-hardened microstructure that mimics the core properties of an actual carburized component. The resulting material exhibits high strength and excellent wear resistance, suitable for applications requiring exceptional surface durability and structural integrity. --- ## **1. Chemical Composition (Weight %)** Complies with standard AISI 4419 specifications. | Element | Min. (%) | Max. (%) | Typical (%) | |---------|----------|----------|-------------| | Carbon (C) | 0.18 | 0.23 | 0.20 | | Manganese (Mn) | 0.45 | 0.65 | 0.55 | | Phosphorus (P) | — | 0.035 | 0.020 | | Sulfur (S) | — | 0.040 | 0.025 | | Silicon (Si) | 0.15 | 0.35 | 0.25 | | Chromium (Cr) | 0.85 | 1.15 | 1.00 | | Molybdenum (Mo) | 0.20 | 0.30 | 0.25 | | Nickel (Ni) | 0.40 | 0.70 | 0.55 | | Iron (Fe) | Balance | | | *Note: The controlled composition ensures consistent response to heat treatment in the 14 mm diameter.* --- ## **2. Physical & Mechanical Properties** *Properties reflect the mock carburized and tempered condition (150°C temper).* ### **Mechanical Properties** - **Tensile Strength:** 1400–1650 MPa (203–239 ksi) - **Yield Strength (0.2% Offset):** 1200 MPa min (174 ksi min) - **Elongation (in 50 mm):** 8–12% - **Reduction of Area:** 35–45% - **Hardness:** 42–48 HRC (401–461 HBW) - **Impact Toughness (Charpy V-notch, 20°C):** 20–35 J (15–26 ft·lb) - **Modulus of Elasticity:** ~205 GPa (29.7×10⁶ psi) - **Fatigue Strength (Rotating Bending, R=-1):** ~620–690 MPa (90–100 ksi) ### **Physical Properties** - **Density:** 7.85 g/cm³ (0.284 lb/in³) - **Thermal Conductivity (20°C):** 42.6 W/m·K - **Coefficient of Thermal Expansion (20–100°C):** 11.5 ×10⁻⁶ /K - **Magnetic Properties:** Ferromagnetic --- ## **3. Microstructural Characteristics** - **Primary Structure:** Tempered martensite with minimal retained austenite (<5%) - **Grain Size:** ASTM 7–8 (fine-grained structure) - **Carbide Distribution:** Fine, uniformly dispersed alloy carbides (Cr, Mo) - **Surface Condition:** Free from decarburization (protective atmosphere during treatment) --- ## **4. International Standards & Cross-References** This material meets the following international specifications: | Standard System | Standard Number | Grade Designation | |----------------|----------------|-------------------| | **USA** | ASTM A534 | Grade 4419 | | **USA** | SAE J404 | 4419 | | **USA** | AMS 6260 | (Similar, for carburizing grades) | | **International** | ISO 683-18:2023 | 41CrMo4+Ni | | **Germany** | DIN EN 10084 | 41CrMo4+Ni | | **Japan** | JIS G4105 | SCM 4 | | **UNS** | — | G44190 | --- ## **5. Typical Applications** This mock carburized condition is specifically engineered for applications requiring high core strength and wear resistance without an actual carburized case. Typical uses include: ### **High-Performance Components** - **Wear-resistant pins and bushings** in heavy machinery - **Hydraulic cylinder rods** and piston shafts - **Precision gears** requiring consistent through-hardened properties - **Agricultural machinery components** (harvester shafts, drive components) - **Material handling equipment parts** (conveyor rollers, guide pins) ### **Specialized Applications** - **Test specimens** for material research and quality control - **Tooling components** requiring high hardness and dimensional stability - **Prototype development** for components that will later be carburized in production --- ## **6. Heat Treatment Specification** ### **Mock Carburizing Cycle** 1. **Austenitizing:** 925–950°C (1695–1740°F) for 60–90 minutes 2. **Quenching:** Oil quench at 60°C (140°F) 3. **Tempering:** 150°C (300°F) for 120 minutes minimum ### **Resulting Characteristics** - **Through-hardened** cross-section with uniform properties - **Minimal distortion** due to controlled quenching - **High compressive strength** and wear resistance - **Good dimensional stability** for precision applications --- ## **7. Machining & Fabrication Notes** ### **Machinability (Annealed Condition)** - **Relative Machinability:** 65% (compared to 100% for AISI 1112 steel) - **Recommended Tools:** Carbide or coated carbide tooling - **Cutting Speeds:** 70–100 m/min (230–330 ft/min) for turning operations ### **Post-Treatment Machining** - **Grinding only** after mock carburizing treatment - **Electrical Discharge Machining (EDM)** suitable with proper parameters - **Surface finishing** may require specialized abrasive processes ### **Welding Considerations** - **Not recommended** in the heat-treated condition - **If necessary:** Pre-heat to 200–250°C (390–480°F) - **Post-weld heat treatment** required for stress relief --- ## **8. Quality Assurance** - **Chemical Analysis:** Performed per ASTM E415 or equivalent - **Hardness Testing:** Rockwell C scale per ASTM E18 - **Microstructural Examination:** Per ASTM E112 and E45 - **Non-Destructive Testing:** Magnetic particle or ultrasonic testing available upon request - **Certification:** Material Test Report (MTR) provided with each lot --- ## **9. Storage & Handling Recommendations** - Store in dry, temperature-controlled environment - Protect from mechanical damage and corrosion - Apply rust preventative oil for long-term storage - Handle with care to prevent surface damage that could affect performance --- ## **10. Comparative Advantages** 1. **Consistent Properties:** Uniform through-hardening in 14 mm diameter 2. **Predictable Performance:** Eliminates case/core interface issues 3. **Cost-Effective Testing:** Ideal for prototype and development work 4. **Reduced Distortion:** Compared to conventional carburizing processes 5. **Material Characterization:** Excellent reference material for testing --- **Disclaimer:** The information provided is for technical reference only. Actual properties may vary based on manufacturing processes and specific heat treatment parameters. Users should conduct their own testing for critical applications. This material is not recommended for applications requiring actual carburized case properties unless specifically validated. Always consult with material engineers for application-specific requirements. **Revision:** 1.0 • **Date:** October 2023 • **Product Code:** 4419-MC-14T -:- For detailed product information, please contact sales. -: AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round Specification Dimensions Size： Diameter 20-1000 mm Length <5591 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round -:- For detailed product information, please contact sales. -:

Packing of AISI 4419 Steel, mock carburized, 150°C (300°F) temper, 14 mm (0.55 in.) round -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2062 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition